Nature Environment and Pollution Technology

R. Anandhan ¹, S. Hemalatha ¹

Affiliations
1 Division of Fisheries Science, Deptt. of Zoology, Annamalai University, Annamalainagar- 608 002, Tamil Nadu, IN

Abstract

The aim of the study was to investigate the bioaccumulation of aluminium in tissues such as gill, liver, muscle and brain, and possibility to use these organs as quantitative bioindicators in polluted aquatic environment. Therefore, the experiment has been designed to provide conditions as close as possible to those found in nature. For this, two sublethal concentrations of aluminium were selected and the fish were exposed for a period of 7, 14, 21 and 28 days. The pattern of accumulation varied significantly among fish organs (liver > gill > muscle). In brain the accumulation was below the detection limit. The study showed that the bioaccumulation rate depends on concentration of the toxicant and length of the exposure period.

Keywords

Brachydanio rerio, Bioaccumulation, Aluminium, Toxicity.

Full Text

   

M. V. Radhakrishnan ¹, S. Hemalatha ¹

Affiliations
1 Department of Zoology, Annamalai University, Annamalainagar-608 002, T.N., IN

Abstract

Effect of sublethal concentration of cadmium chloride (12 ppm; 10% of 96h LC₅₀) in erythrocytes of catfish was studied for a period of 5, 10, 20 and 45 days. It was found that the activity of superoxide dismutase (SOD) in red blood cells (RBC) significantly decreased after 5 and 10 days of cadmium exposure. However, the SOD activity increased after 20 and 45 days of cadmium treatment. Elevated activity of catalase (CAT) was found in erythrocytes of cadmium treated fish after 45 days. These results indicate oxidative stress and cell damage in the exposed fish.

Keywords

Heteropneustes fossilis, Erythrocytes, Superoxide Dismutase, Catalase, Cadmium , Exposure.

Full Text

   

N. Anandhaparameswari ¹, S. Hemalatha ¹, G. S. Vidhyalakshmi ¹, K. Shakunthala ¹

Affiliations
1 Department of Chemistry, Sri GVG Visalakshi College for Women, Udumalpet-642128, T.N., IN

Abstract

To assess the physico-chemical characteristics for ground water quality, samples of bore-well water from houses in and around Sivalingampillai layout, Udumalpet, were collected and analysed during the period June and October 2005. The experimental values of various parameters were compared with standard values and the results clearly indicate that the quality of water from bore-wells is degraded in that period.

Full Text